RPC: clnt_create() misbehaving with glibc 2.31?

[Michael Brunnbauer]

Hello Florian,

On Mon, Mar 30, 2020 at 05:27:35PM +0200, Florian Weimer wrote:
> > Is clnt_create() implemented fully by TIRPC or is glibc involved somehow?
> 
> That depends.  You need to check the symbol version which the
> application is bound to (e.g., using eu-readelf or objdump -T).

Looks like TIRPC's clnt_create is used. My real client has:

 0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_create

And my 64bit rpcinfo - which also shows the problem - has:

objdump -T /usr/bin/rpcinfo |grep clnt_
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_sperrno
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_vc_create
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_tli_create
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_tp_create
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_pcreateerror
0000000000000000      DF *UND*  0000000000000000  TIRPC_0.3.0 clnt_perror

My 32bit rpcinfo shows this:

objdump -T ./rpcinfo |grep clnt_
00000000      DF *UND*  00000000              clnt_tp_create
00000000      DF *UND*  00000000              clnt_perror
00000000      DF *UND*  00000000              clnt_tli_create
00000000      DF *UND*  00000000              clnt_pcreateerror
00000000      DF *UND*  00000000              clnt_sperrno
00000000      DF *UND*  00000000              clnt_vc_create

As glibc-stuff shows with "GLIBC_2.0" in there, I assume the 32bit version also
uses TIRPC's functions.

I will have a closer look at what the TIRPC clnt_create does and maybe get in 
contact with the TIRPC maintainers.

Regards,

Michael Brunnbauer

-- 
++  Michael Brunnbauer
++  netEstate GmbH
++  Geisenhausener Straße 11a
++  81379 München
++  Tel +49 89 32 19 77 80
++  Fax +49 89 32 19 77 89 
++  E-Mail brunni@netestate.de
++  https://www.netestate.de/
++
++  Sitz: München, HRB Nr.142452 (Handelsregister B München)
++  USt-IdNr. DE221033342
++  Geschäftsführer: Michael Brunnbauer, Franz Brunnbauer
++  Prokurist: Dipl. Kfm. (Univ.) Markus Hendel
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <http://sourceware.org/pipermail/libc-help/attachments/20200330/3ab2e95e/attachment.sig>